A leading commercial HVAC company serving Washington DC, Virginia, and Maryland.

Thornton Service provides commercial HVAC services to clients throughout the Washington metropolitan area. Our skilled HVAC technicians specialize in preventive maintenance and repair of commercial heating and cooling systems. From emergency repair to maintenance-only HVAC contracts and facilities management, we support a range of industries, including healthcare, education, government and mission critical data centers.

Thornton Service approaches each client as a partner. We work with data centers, technology companies, residential highrise buildings, government entities, and a variety of other Washington DC facilities to increase their uptime, lower their operating costs, and promote a better future through commercial HVAC installation and maintenance. For more than 40 years, commercial clients have relied on our HVAC installation, maintenance, and repair services to keep their equipment functioning well at the lowest cost possible.

Thornton Service is a privately held HVAC company. We support and appreciate the Washington DC community where each of our team members and our clients lives and work. As a Thornton Service client, you’ll always be assigned a dedicated team member to meet in person, answer your questions, understand your facility’s unique challenges, and provide guidance to overcome issues and improve your bottom line.

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We know the path to energy sustainability is a journey not an event. We partner with each client to analyze their utility bills, identify no-cost/low-cost savings opportunities, implement operations and maintenance practices and identify system upgrades and retrofits with a return on investment.